If you had said best, I might of agreed with you. There is no reason major investment items can not remain good, or even great. As to there being no reason to do new content if it does remain good, people do not always do content for loot, Monstrosity is a very good current example of that. Plus I would rather have a plethora of old content to do that is still meaningful than a tiny bit of new content being the only driving force of a MMO.
